#include <stdio.h>

int main(){
     int a = 10;
     int b = 20;
     int c = a + b;
     printf("%d",c);
     6666；
     bbbbbbbbbbbbb;
     diahdiwlahdila;
    dajwldjailw;
    nihao ;
    7777；
    1111111111;
    8888888；
     return 0;

}